GB1437393A - Digital data transmission system - Google Patents

Digital data transmission system

Info

Publication number
GB1437393A
GB1437393A GB3302473A GB3302473A GB1437393A GB 1437393 A GB1437393 A GB 1437393A GB 3302473 A GB3302473 A GB 3302473A GB 3302473 A GB3302473 A GB 3302473A GB 1437393 A GB1437393 A GB 1437393A
Authority
GB
United Kingdom
Prior art keywords
words
word
transmitted
transmitter
data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3302473A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1437393A publication Critical patent/GB1437393A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/14—Arrangements for detecting or preventing errors in the information received by using return channel in which the signals are sent back to the transmitter to be checked ; echo systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Retry When Errors Occur (AREA)

Abstract

1437393 Digital data transmission, error correction WESTINGHOUSE ELECTRIC CORP 11 July 1973 [31 July 1972] 33024/73 Heading H4P A digital data transmission system comprises: a transmitter in which each data word to be transmitted is provided with a "field code" which identifies its position in a sequence of words; a receiver which temporarily stores and then retransmits the data; and means at the transmitter for comparing corresponding transmitted and retransmitted words to cause the transmitter to transmit again any incorrect data words. Data words to be transmitted are fed to register 71 where they are added to one of four sequentially repeated field codes representing the numbers 1, 2, 3, 4 and are then passed to an acoustic coupler for transmission over a telephone line. The register also feed the words to a two-word capacity store 73. At the receiver the received words are stored in register 84 and then returned to the transmitter and also passed to one of the two-word stores 90 or 91 depending on whether their field code is odd or even. The data words returned to the transmitter are compared in comparator 74 with the corresponding initially transmitted word and if they agree the next word is transmitted. If they differ, the word stored in register 73 is transmitted again and is again stored in receiver store 90 or 91. Thus if either store contains two words with the same field code, it indicates an error, and gate 92 is inhibited to prevent the incorrect word being fed to the output data buss. When two different words are stored, gate 92 is enabled to pass the first one to the output buss.
GB3302473A 1972-07-31 1973-07-11 Digital data transmission system Expired GB1437393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00276345A US3805234A (en) 1972-07-31 1972-07-31 Digital data transmission system

Publications (1)

Publication Number Publication Date
GB1437393A true GB1437393A (en) 1976-05-26

Family

ID=23056279

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3302473A Expired GB1437393A (en) 1972-07-31 1973-07-11 Digital data transmission system

Country Status (6)

Country Link
US (1) US3805234A (en)
JP (1) JPS594906B2 (en)
CA (1) CA985785A (en)
DE (1) DE2337703C2 (en)
FR (1) FR2195128B1 (en)
GB (1) GB1437393A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030629A2 (en) * 1979-12-12 1981-06-24 Siemens Aktiengesellschaft Apparatus for feeding a data drain with data words while using a series-parallel converter
GB2183975A (en) * 1985-11-22 1987-06-10 Sharp Kk Data error-checking system
GB2246054A (en) * 1990-07-12 1992-01-15 Siemens Plessey Assessment Ser Digital communications equipment test method

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5075707A (en) * 1973-11-07 1975-06-21
US3995258A (en) * 1975-06-30 1976-11-30 Honeywell Information Systems, Inc. Data processing system having a data integrity technique
FR2319161A1 (en) * 1975-07-22 1977-02-18 Cit Alcatel DATA READING AND PROCESSING SYSTEM, ESPECIALLY FOR VARIABLE HOURS
US4162536A (en) * 1976-01-02 1979-07-24 Gould Inc., Modicon Div. Digital input/output system and method
US4377862A (en) * 1978-12-06 1983-03-22 The Boeing Company Method of error control in asynchronous communications
US4271470A (en) * 1979-02-21 1981-06-02 Pitney Bowes Inc. Serial data bus for use in a multiprocessor parcel postage metering system
US4225960A (en) * 1979-03-01 1980-09-30 Westinghouse Electric Corp. Automatic synchronizing system for digital asynchronous communications
JPS5837736B2 (en) * 1979-09-04 1983-08-18 ファナック株式会社 Serial data transmission method
US4526010A (en) * 1980-04-30 1985-07-02 Mitsubishi Denki Kabushiki Kaisha Separation type air conditioner
USRE33368E (en) * 1980-10-10 1990-10-02 At&T Bell Laboratories Data set network diagnostic system
FR2501855A3 (en) * 1981-03-16 1982-09-17 Saphymo Stel Data transmission system between fixed and moving assemblies - uses switching controllers for transmitters and receivers to transfer real=time data through coupling transformer
US4488237A (en) * 1982-04-29 1984-12-11 Dynamics Research Corporation Two dimensional press brake control system and apparatus
JPS6086803U (en) * 1983-11-18 1985-06-14 株式会社ハーマン gas cooker
US4882669A (en) * 1983-11-28 1989-11-21 Canon Kabushiki Kaisha Multi computer fail safe control apparatus
US4754426A (en) * 1984-05-31 1988-06-28 American Television & Communications Corporation System for controlling communications on a cable television network
US4710956A (en) * 1984-05-31 1987-12-01 American Television & Communications Corporation Cable television system
US4684980A (en) * 1984-05-31 1987-08-04 American Television & Communications Corporation System for controlling communications on a cable television network
US4673976A (en) * 1984-05-31 1987-06-16 American Television & Communications Corporation Cable television system data verification apparatus
US4852127A (en) * 1985-03-22 1989-07-25 American Telephone And Telegraph Company, At&T Bell Laboratories Universal protocol data receiver
US4982430A (en) * 1985-04-24 1991-01-01 General Instrument Corporation Bootstrap channel security arrangement for communication network
US4922408A (en) * 1985-09-27 1990-05-01 Schlumberger Technology Corporation Apparatus for multi-processor communications
CA1263760A (en) * 1985-09-27 1989-12-05 Alan L. Davis Apparatus for multiprocessor communication
GB2220280B (en) * 1988-07-04 1992-10-21 Rolls Royce & Ass A control system for industrial plant
US5159684A (en) * 1989-05-24 1992-10-27 Pitney Bowes Inc. Data communication interface integrated circuit with data-echoing and non-echoing communication modes
US5467475A (en) * 1989-10-13 1995-11-14 Hitachi Maxell, Ltd. Data collection-transmission apparatus and data collection system
US5142538A (en) * 1990-04-19 1992-08-25 Photonics Corporation Link protocol for rs 232 communications
US9812059B2 (en) * 2015-07-13 2017-11-07 Sct Technology, Ltd. Display device, method for transmitting data packet, and LED system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR960755A (en) * 1943-12-18 1950-04-25
DE1184373B (en) * 1955-08-05 1964-12-31 Dr Gerhard Dirks Method and circuit arrangement for checking coded messages in telecommunication systems, in particular teleprinter systems
DE1036308B (en) * 1956-12-04 1958-08-14 Standard Elektrik Lorenz Ag Method for the transmission of telex characters with partially increased transmission security
NL260263A (en) * 1960-06-24
NL268820A (en) * 1960-09-01
GB948519A (en) * 1961-11-10 1964-02-05 Ass Elect Ind Improvements relating to arrangements for detecting signal transmission errors in telegraph and like systems
DE1294434B (en) * 1965-07-27 1969-05-08 Telefunken Patent Arrangement exposed to burst disturbances for the secure transmission of coded data, in which the information is sent continuously
US3473150A (en) * 1966-08-10 1969-10-14 Teletype Corp Block synchronization circuit for a data communications system
DE1512560A1 (en) * 1967-01-16 1969-02-13 Telefunken Patent Arrangement for the secure transmission of binary coded data

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030629A2 (en) * 1979-12-12 1981-06-24 Siemens Aktiengesellschaft Apparatus for feeding a data drain with data words while using a series-parallel converter
EP0030629A3 (en) * 1979-12-12 1981-09-16 Siemens Aktiengesellschaft Berlin Und Munchen Apparatus for feeding a data drain with data words while using a series-parallel converter
GB2183975A (en) * 1985-11-22 1987-06-10 Sharp Kk Data error-checking system
GB2183975B (en) * 1985-11-22 1989-10-04 Sharp Kk A system for checking for errors in data transmission
US5051899A (en) * 1985-11-22 1991-09-24 Sharp Kabushiki Kaisha Data transmission error detection in an electronic cash register system
GB2246054A (en) * 1990-07-12 1992-01-15 Siemens Plessey Assessment Ser Digital communications equipment test method

Also Published As

Publication number Publication date
CA985785A (en) 1976-03-16
US3805234A (en) 1974-04-16
JPS594906B2 (en) 1984-02-01
DE2337703C2 (en) 1983-01-13
DE2337703A1 (en) 1974-02-07
FR2195128B1 (en) 1978-02-10
JPS4953703A (en) 1974-05-24
FR2195128A1 (en) 1974-03-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee